html, body, #app, .el-container{
    height:100%;
}
body {            
    background-color: #f0f2f5;
    margin: 0;
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
    font-size: 14px;
    display: flex;
    flex-direction: column;
}
.el-main {
    flex: 1 0 auto;
    padding: 0px;
}
.el-header, .el-footer {
    background-color: #fff;
    flex: 0 0 auto;
}

.el-menu-item {
    font-size: 15px;
}